A theory for the effective thermal conductivity (ETC) of an unsaturated and saturated medium containing three phases is presented using the effective continuous media (ECM) approximation. The boundary condition for ECM through a successive dispersion technique is first derived. Small dispersions are then allowed in the proposed ECM. The method is an analytical one and shows the validity and emergence of ECM for large dispersions. The theory is applicable for all saturating fluids including gas and is useful for determining the content of petroleum products in underground soil. A comparison of calculated values of ETC with experimental ones when the saturating fluids are air and water shows a good agreement.
Pande, R., Gori, F. (1987). Effective Media Formation and Conduction Through Unsaturated Granular Materials. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 30(5), 993-1000 [10.1016/0017-9310(87)90017-2].
Effective Media Formation and Conduction Through Unsaturated Granular Materials
GORI, FABIO
1987-01-01
Abstract
A theory for the effective thermal conductivity (ETC) of an unsaturated and saturated medium containing three phases is presented using the effective continuous media (ECM) approximation. The boundary condition for ECM through a successive dispersion technique is first derived. Small dispersions are then allowed in the proposed ECM. The method is an analytical one and shows the validity and emergence of ECM for large dispersions. The theory is applicable for all saturating fluids including gas and is useful for determining the content of petroleum products in underground soil. A comparison of calculated values of ETC with experimental ones when the saturating fluids are air and water shows a good agreement.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
